Acidic CO2 electroreduction is carbon efficient but suffers from low energy efficiency and selectivity. Here an interfacial cation matrix is developed to enrich alkali cations and increase the local pH at a Cu–Ag catalyst surface, improving efficiency. A 45% CO2-to-ethanol Faradaic efficiency and 15% energy efficiency for ethanol production are achieved.
- Ali Shayesteh Zeraati
- Feng Li
- David Sinton
